Skip to Main Content
Due to a lapse in federal funding, this USDA website will not be actively updated. Once funding has been reestablished, online operations will continue.
Geographical distribution of Phytophthora ramorum in NorwayAuthor(s): María- Luz Herrero; Brita Toppe; Trond Rafoss
Source: In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. p. 373
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
PDF: View PDF (133 KB)
DescriptionIn November 2002, Phytophthora ramorum was detected for the first time in Norway. It was isolated from Rhododendron catawbiense imported earlier the same year. After the first detection, the Norwegian Food Safety Authority has carried out surveys from 2003 to 2006. The surveys were first directed to nurseries and garden centres. Most of the positive findings were on Rhododendron spp., but one sample of Pieris japonica, one of Kalmia sp., one of Syringa sp. and one of Viburnum sp. were also positive. In 2005 and 2006, P. ramorum was isolated from well-established viburnum and rhododendron plants in private gardens, parks and public greens. Infections were detected on well-established plants from nine different outdoor sites. While the positive samples from nurseries were spread over the country, the positives found on well-established plants were concentrated in and around the cities of Bergen and Stavanger on the southwestern coast of Norway. This part of the country has cool summers, mild winters and more than 2000 mm of annual precipitation. In 2006, P. ramorum was found in private gardens in the eastern part of the country on young recently introduced plants. P. ramorum was found in 12 import shipments, mainly on rhododendron, but also on a viburnum sample.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationHerrero, María- Luz ; Toppe, Brita; Rafoss, Trond. 2008. Geographical distribution of Phytophthora ramorum in Norway. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. p. 373
KeywordsPhytophthora ramorum, Norway, survey
- Epidemiological modeling of Phytophthora ramorum: network properties of susceptible plant genera movements in the nursery sector of England and Wales
- Effect of herbicides on production of inoculum and root colonization of plants infected with Phytophthora ramorum
- Molecular identification and detection of Phytophthora ramorum
XML: View XML